An antidote for the startup emotional ups and downs

I am not a huge fan of self-help books. I find most are not grounded in any science and/or written by charlatans / pied piper types with a lot of mastery of dark patterns. More than likely, they'll take you off your noble path of business building with focus steered away to their systems, courses, etc.

Still, I came across this book on a podcast and, about 45% in, it's becoming a huge support mechanism to me as a solo bootstrapped builder @ PMF stage. The author has the credentials and has worked with successful U.S. Olympians, soldiers and professional athletes. Plus, his exercises are highly practical, which appeals to me the most.

I won't do a full review as I don't want to rob you, the reader, from a nice journey of discovery. This will help keep your motivation and energy levels up as it has mine. I wish I found it months sooner.